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Summary of Significant Accounting Policies - Summary of Net Sales Attributable to Various Segments (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2017 | Oct. 01, 2017 | Jul. 02, 2017 | Apr. 02, 2017 | Jan. 01, 2017 | Oct. 02, 2016 | Jul. 03, 2016 | Apr. 03, 2016 | Dec. 31, 2017 | Jan. 01, 2017 | Jan. 03, 2016
Operating Segment Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 242,889 | $ 270,471 | $ 243,671 | $ 252,604 | $ 266,283 | $ 279,015 | $ 241,409 | $ 234,528 | $ 1,009,635 | $ 1,021,235 | $ 1,029,098
Hard goods [Member] |  |  |  |  |  |  |  |  |  |  |
Operating Segment Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 509,618 | 529,869 | 534,864
Athletic and sport apparel [Member] |  |  |  |  |  |  |  |  |  |  |
Operating Segment Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 206,816 | 200,476 | 199,109
Athletic and sport footwear [Member] |  |  |  |  |  |  |  |  |  |  |
Operating Segment Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 288,536 | 287,399 | 291,325
Other sales [Member] |  |  |  |  |  |  |  |  |  |  |
Operating Segment Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 4,665 | $ 3,491 | $ 3,800

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